Selbsttaetig aufspannbarer Schirm

摘要

1,274,802. Automatic umbrellas. ALASKA UMBRELLA INDUSTRIES CO. Ltd. April 20, 1970 [Oct. 6, 1969; Oct. 7, 1969; Oct. 8, 1969], No. 18759/70. Heading A4P. An automatically openable, foldable umbrella has a stick 1 comprising large and small diameter tubes 2 and 4 respectively telescopically engaged and extensible by a spring 11, Fig.3. Upper and lower sliders 18 and 19 respectively carry struts and auxiliary struts 21 and 22, Fig. 1, respectively, the sliders are separated by a spring 25, which is in two oppositely wound parts 41 and 42, and which on expansion erects the canopy frame. The outer ends 211 of the struts 21 are pivoted to the inner ends of outer rib portions 20b, which are of circular section, by means of a mounting member (351), Fig. 4 (not shown), and slide within "U" section inner rib portions 20a guided by a tube 35. A resilient locking member 15 has large and small detents 14 and 13 respectively which project through slots in the small diameter tube 4 to engage slots in the large diameter tube 2 and the lower slide 19 in the closed position. Large detent 14 also engages a slot 31 in a sleeve 32 of a tip cup 29 which when slid along the tube 4 against a spring 34 both depresses the large detent 14 so releasing the large diameter tube 4 and the lower slider 18, and disengages the tipsof the ribs 20 thus permitting self erection of the umbrella. Relative rotation of the component parts is prevented by a groove (3), Fig. 8 (not shown) in the small diameter tube 1 which engages a projection 39 in the tip cup 29 and a projection 38 in the large diameter tube 2. A rod 8 projecting into the groove (3) acts as a stop to limit the extension of the stick by engaging projection (10) Fig. 7 (not shown) on the large diameter tube 2. An open position detent is provided by balls 6 which are urged outwardly by leaf-spring 7. The impact of opening is absorbed by a cushioning spring 37. Alternative embodiments of the tip cup 29 are shown in Figs. 12-15 (not shown). In Figs. 14 and 15 the tips are guided into the cup by means of a tapered guide surface (40).